Analytical Chemistry Interview Questions
Questions Answers Views Company eMail

One Raw material failed assay test is there any chance for failing purity of that material ?

Mylan,

7 12588

What are the differences between GC and HPLC?

1 14600

Why do we need GC instead of HPLC? or Why do we need HPLC instead of GC?

4 12127

What is linearity in HPLC and how will you test?

1 19186

what is the difference between polarimeter lamp and ir lamp

3095

What is the difference of time between two consecutive injections in HPLC?

Nectar Lifesciences,

2 10158

what is difference between IR lamp and polarimeter lamp

Raks Pharma,

2 9140

Why dissolution test is not performed in all of the products

Biocon, SDD,

2182

why we need to do karl ficher fector ?

Reliance,

2 11714

Why we are use 0.005M Sulphuric acid, in control of absorbance performance test UV Spectrophotometer calibration

Cipla, Reddy Labs,

2 15559

How much sample concentration should i inject against diluted standard in related substances for drug product in hplc analysis

Apotex,

1 3958

how to prepare 25 ppm acetone. explian with formula

4 16788

why sucrose not used in polarimeter calibration?

Cipla,

2 10035

What is the diffeence between assay and uniformity of content

2 9358

why ur using toulene in hexane in u.v calibration?

Biological.e.limited, Cipla,

3 28893


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Un-Answered Questions { Analytical Chemistry }

why we should take dst factor for below 1%moisture samples

2329


if peak get problamatic then what require to do?

454


Identify problem faced when mass spectroscopy is used with HPLC system ?

1501


Principle of single pan analytical balance

4739


How to calculation of residual solvent methanol (3000 ppm) standard solution, and how many quantity used of test sample

2759






Difference between the quantitative analysis and qualitative analysis?

769


How to decide assay range for non pharmacopeial API analysis by HPLC? Could you give me any reference for same e.g Guidelines or Paper publications?

2990


AT WHAT CONDITIONS WILL YOU ANALYSE A SAMPLE,WHICH ARE PRESERVED AT OTHER THAN THE AMBIENT CONDITIONS?(ie COLD STORAGE SAMPLES BELOW 20* CENTIGRADE?

1735


In which situation we require to analytical method validation of excipient?

442


Is it nessesary all multimedia dissolution require descriminatory?

446


How can we calculate offset value pH measurment

1196


why salisylic acid not using now days for disdolution calibration?

429


how we can identify the impurity is coming below loq at transfering site?

514


A ha tc is actual defination of retention time?

1216


What is the difference between chromatographic purity and related substances?

938